Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenue:
Trucking revenue	$ 321,283	$ 338,369	$ 310,023
Strategic Capacity Solutions revenue	67,085	34,917	13,741
Intermodal revenue	22,658	13,597	7,756
Base revenue	411,026	386,883	331,520
Fuel surcharge revenue	108,382	73,278	50,848
Total revenue	519,408	460,161	382,368
Operating expenses and costs:
Salaries, wages and employee benefits	136,538	132,445	128,319
Fuel and fuel taxes	137,195	114,915	93,803
Purchased transportation	120,076	79,601	44,058
Depreciation and amortization	49,263	49,754	50,152
Operations and maintenance	42,179	36,086	26,594
Insurance and claims	22,501	22,811	21,086
Operating taxes and licenses	5,460	5,652	5,642
Communications and utilities	4,395	3,948	3,951
Gain on disposal of assets	(3,615)	(320)	(7)
Other	18,065	15,177	15,377
Total operating expenses and costs	532,057	460,069	388,975
Operating (loss) income	(12,649)	92	(6,607)
Other expenses (income):
Interest expense	3,345	3,438	3,030
Other, net	(252)	(45)	(207)
Total other expenses, net	3,093	3,393	2,823
Loss before income taxes	(15,742)	(3,301)	(9,430)
Income tax (benefit) expense:
Current			(10,523)
Deferred	(4,965)	7	8,270
Total income tax (benefit) expense	(4,965)	7	(2,253)
Net loss	$ (10,777)	$ (3,308)	$ (7,177)
Net loss per share:
Basic loss per share (in Dollars per share)	$ (1.05)	$ (0.32)	$ (0.70)
Diluted loss per share (in Dollars per share)	$ (1.05)	$ (0.32)	$ (0.70)